package com.cym.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.nio.charset.Charset;
import java.util.List;

@Configuration
@ComponentScan("com.cym.controller")
@EnableWebMvc
public class SpringMvcConfig implements WebMvcConfigurer {

    //配置文件上传解析器
    @Bean
    public CommonsMultipartResolver multipartResolver() {
        CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver();
        // 最大文件 2MB
        commonsMultipartResolver.setMaxUploadSize(1024 * 1024 * 2);

        commonsMultipartResolver.setDefaultEncoding("UTF-8");

        return commonsMultipartResolver;
    }

    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        StringHttpMessageConverter stringConverter = new StringHttpMessageConverter();
        stringConverter.setDefaultCharset(Charset.forName("UTF-8"));
        converters.add(0,stringConverter);
    }

    // 配置静态资源映射
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        // 映射 classpath 下的 static 目录  classpath:/static/ 是指 src/main/resources/static/
        //映射的是 webapp/static/ 目录，应使用 file:./static/（相对于当前 Web 应用根目录）
//        registry.addResourceHandler("/static/**").addResourceLocations("file:./static/*");

        // 映射用户上传文件的访问路径
        registry.addResourceHandler("/upload/**").
                addResourceLocations("/static/upload/");
    }
}
